Controlling micropollutants in tertiary municipal wastewater by O3/H2O2, granular biofiltration and UV254/H2O2 for potable reuse applications
| Autor: | Maria Giulia Lionetto, Iolanda Pio, F. Piras, E. De Dominicis, Domenico Santoro, Roberto Caricato, Giuseppe Mele, Elisa Gritti, Oronzo Santoro, Tiziano Pastore |
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| Přispěvatelé: | Piras, Federica, Santoro, O., Pastore, Tommaso, Pio, I., De Dominicis, E., Gritti, E., Caricato, R., Lionetto, M. G., Mele, G., Santoro, D. |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
Health Toxicology and Mutagenesis Biofiltration 0208 environmental biotechnology 02 engineering and technology 010501 environmental sciences Reuse Wastewater 01 natural sciences medicine Environmental Chemistry Effluent 0105 earth and related environmental sciences Micropollutant Public Health Environmental and Occupational Health General Medicine General Chemistry Pulp and paper industry Pollution 020801 environmental engineering Biofilter Environmental science Water quality Potable reuse Activated carbon medicine.drug Advanced oxidation processe |
| Popis: | A comprehensive pilot study was carried out to experimentally assess the potential of newly developed treatment trains integrating two-stage AOPs and biofiltration to reach potable reuse water quality standards from municipal wastewater. The processes consisted of a two-stage AOPs with (carbon or limestone) biofiltration, the first AOP (O-3/H2O2) serving as pre-treatment to biofiltration and the second AOP (UV254/H2O2) serving as post-biofiltration finishing step to ensure advanced disinfection. A comprehensive monitoring campaign was put in place resulting from the combination of targeted, nontargeted and suspect screening measurements. It was found that 13 organic micropollutants were detected from a list of 219 suspects although at ng/L level only. For the treatment conditions piloted in this study (O-3=13 +/- 0.5 mg/L H2O2 = 11 +/- 0.4 mg/L for the O-3/H(2)O(2 )process, and UV = 410 +/- 63.5 mJ/cm(2), H2O2= 5 mg/l for the UV254/H(2)O(2 )process), it was possible to estimate the overall removal efficacy for each unit process, which was found to follow this order: RO (99%) > BAC (87%) > O-3-H2O2(78%) > BAL (67%) > UV/H2O2(43%) > AOP contact chamber (19%) > UF(0%), with the treatment train integrating two AOPs and granular biofiltration with activated carbon (O-3/H2O2+ BAC + UV254/H2O2) showing superior performance with a 99% abatement in total micropollutants. No ecotoxicologically-positive response was generally observed for any of the effluent samples from the tested trains, even when pre-concentration factors up to 100-1000 times were employed to increase the sensitivity of the bioassay methods. |
| Databáze: | OpenAIRE |
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